I am trying to help out a friend and have turned up with absolutely nothing. He has come to me for box plans for his new sub, Massive audio Toro 12 2 ohm dvc. I built a box for my kicker l5 15" that turns head and would make you think twice about buying kicker, so he wants that same kinda wow that is coming out of a twelve factor that I am getting. Anyway he built a box that measures in around 1.875 cubic feet after displacements with a slot port tuned around 39-40 hz(he isn't a low note fiend like I am) Port area is about 11" per cubic foot so that isn't a problem, but it seems to bottom out a ton on a massive p1500.1 amp at 1 ohm, which is rated as a 1250 rms, the sub is 1200. The thing that is killing me is the specs for the sub.
Vas .829 cubic feet is tiny right? That makes a good box only like half a cubic foot, that can't be right.
Qts: .448 at 4 ohm, .328 at 1 ohm, both reasonable
Fs: 45 HZ!!! holy hell that is high, but as I look at a lot of similar subs they share some of these specs
How can a half a cubic foot box tuned to around 55hz be the perfect box haha, that is what every calculator is telling me. I have explored 4th or 6th or bandpass and even some 8th order quasi stuff that is a bit over my head. He has the sub wired to 4 ohm so its getting 650 according to the massive manual. It's loud as it is getting only half the power it can but it is more of a temporary setup until we figure something out. PLEASE HELP, whether it is be explaining how higher end subs with low qts values and small vas values and a high fs numbers can work in a nicely designed box, because the one to massives specs that he built will not interact well with this sub.